Oil-well pump



May 22, 1923.

C. E. WILCOX OIL WELL PUMP Filed Dec. 27

Patented Mey 22, 1923.

UNET@ SATS RLES E. WILCOX, 0F ANAHEIM, CALIFORNIA.

OIL-WELL PUMP.

Application led December 27, 1921. Serial No. 524,887.

To all whom 'it may cof/wem."

Be it known that I, CHARLES E. WiLcox, a

-citizen of the United States, residing at which the pump rods pass, being attached at their lower end to a plunger, which is reciprocated by pump rods in a working barrel secured to and forming the lower en of the tubing.

These pumps often operate under extremely adverse conditions due to the presence of line sand or silt which is carried in the oil. This sand or silt tends to wear. out the plunger and working barrel, and it is common practice to provide renewable liners for the pump, which liners are, however, in the standard forms of pumps continuous throughout the length of the pump.

It is an object of my invention tov provide an oil well pump which will be so desIgned that the wear from sand or silt will be a minimum.

It is a further object of my invention to provide a pum which isrso constructedl that there is little iability ofthe pump becoming jammed or plugged by sand deposited therein. i

It is a still-.further object of my invention to provide a pump which is provided with liners which are so arranged that they are self adjusting .tocompensate for irregularities in manufacture, and in which ythe liners are of such dimensionsthat they can be readil', accurately, and economically machin Further objects and advantages will be made evident hereinafter.

Referring to the drawing, which is for illustrative purposes only,

Fig.,1 is a cross section through the center of a pump embodying m invention.

Fig. 2 is a section on a p ane represented by the line 2 2, Fig. 1.

Fig. 3 is a section on aplane represented by the line 3f-3, Fig. 1.

Figs. 2 and 3 are` on a somewhat larger scale than Fig. 1,

n the form of the invention illustrated in the drawings, the lower end of the tubing is shownI at 11. A threaded' connection 12 is provided on a plunger 13 for the attachment of the pump rods.

The'plunger 13 is of the standard construction consisting of a long cylinder, pref erably vof soft steel, having its periphery machined to form an accurate cylinder of uniform diameter. Carried in the top of the plunger 13 is a working valvey 14 and seated in a collar 15 at the bottom of the pump is a standing valve 16, this valve being provided with a garbutt rod 17 which extends up into the plunger 13, sliding freely therein during the operation of the pump, but being engaged and lifted by the .plunger 13 when the same is withdrawn rom the pump for purposes of inspection or repair. Parts equivalent to members 12 to l17 are at the present time standard in the koil well art. j

Secured to the bottom ofthe tubing 11 is a collar 20, this collar being externally threaded at 21 to lit into one of several 4barrel sections 22. The barrel sections 22 have shoulders 23 upon each of which a hardened liner 24 rests, the liners each being clamped between one of the shoulders 23 and the end of the next higher barrel section or, in the case of the top barrel section, the collar 21. The liners 24l are-somewhat smaller in diameter than the cylindrical cavities 25 formed in the barrel sections 22 in which theyv are placed. The barrel sections each have a recess v26 Jformed therein around the plunger 13 below the shoulder 23 and each barrel section terminates in' an externally threaded portion 27 which fits into'a collar 28 formed on the next lower barrel section. The lowest section 22 is threaded into the collar 15.

The liners 24C are' preferably formed of hardened steel and are provided with a uniform bore fitting very accurately u n the outside of the plunger 13. These liners 2li are free to adjust themselves in a' direction parallel to the planeindicated by the line 2 2, thus preventing undue side wear'therein in the event that the lunger 13 is not absolutely straight or is slightly out of line.

By providing these short liners, sand troubles are reduced to a minimum. This is due to the fact that these liners can be very accurately machined and hardened and as theyare self adjusting in the barrel, friction and' weartherein are greatl reduced. Moreover, in the event that t e well Vis pumping an yoil containing a great deal of sand, this sand is largely excluded from the j out ofthe space by the su sequent movement of the plunger 13 which is much greater than the length 'of the liners. When the pum is first laced in the well, the spaces 26 areglled wit hard grease, this hard grease tending to exclude the oil land sand and providing avery perfect lubricationof the plunger.

I do not claim .that-it is possible to make a pump in which the plunger and liners will not wear in the presence of sand; but by lpro'- viding a lurality of liners, separated by spaces initially filled with hard grease, I am able,;'however, to provide for a plurality of wearing surfaces, each of which is inde'- pendent of the lothe'rs,'and each of which must be progressively broken down before the pum is out of service. In other words,

the top iner 24 may become so worn that itv will not hold oil without in any way impairing the eiiiciency of the next'lowerl liner-24,

and the next lower liner 24' may, in turn, be-

come impaired without impairing the e-v ciency of 'the liners below it. It is thus possible, by providing a plurality of liners, to greatly prolong the life of the pump as compared with those pumps in which the barrel works in la single long cylinder formed of a.'

single liner, or is aplurality of liners placed end to end.y

I claim as my invention:

1. "A working barrel for an oil well pum comprising: a series of liners eachadapte vto fit on a pump plunger; and means for supporting said liners `so as to leave a space around said plunger, and between said liners` y 2. Al working barrel for an oil well pump comprising: a series of liners each adapted to fit .on a pum plunger; and meansfor supportin said iners so as to leave a space around said plunger, between said liners, and

so as to allow each of said liners a limited movement in la plane to which the axis of the 'plunger is perpendicular to allow for faulty 4. A working barrel for an oil well pum comprising: a series of liners each adapte to lit on a pump plunger; and a plurality of barrel sections, each section being threaded in an adjacent section, and each liner being clamped between one barrel section and the next barrel section.

5. A working barrel for an oil'well pump comprising: a series of liners each adapted -to fit on,a pump plunger; and 'a plurality of barrel sections, each section being thread- Ved in an adjacent section, and each liner be-l ing clamped between externally threaded barrel sections and the next barrel section.

6. A working barrel for an oil well pump com rising: a series of liners, each adapted to t on a pump plunger; and means for Asupporting' said liners so as to leave a -space around said plunger and between said liners, saidy space being filled with a lubricant.

7 A working barrel for an `Aoil well pump pom rising: a series of liners, each adapted o supporting said iners so as to leave a space around saidplunger between said liners so as toallow 'each of. said liners a limited movement in a lplane to which the axis of the plunger is perpendicular to allow for the alignment vof said plunger, the spaces between 'said linerbeing initially filled with lubricant.

8. A working. barrel for an oil well pum comprising a series of liners, each adapted to fit on a pump plunger; and a plurality of barrel sections, each liner being clamped between one barrel section and the next barrel section, a space being left around said plunger between said liners, this space binginitially filled with lubricant.

In testimon whereof, I have hereunto set my hand at laasv Angeles, California, this 21st day of December,1921.

CHARLES E. wILoox.

t on a pum plunger; sand means for 

